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@uiten gisten zttw-t @Hired CIICRCE F. LEWIS, Cr PHILADELPHIA, PENNSYLVANIA, IINn FREDERICF n.l STUART, or WASHINGTON CITY. DISTRICT or COLUMBIA.

I Leserinnen: No. 77,896, dated-May 12,1868.

IMPROVEMENT IN CYLINCIIICAI. PLATE-PRINTING MACHINERY.

@te Stimuli referrer in in tigen ttttns @nient zint mating ,tutti the entre,

TO ALL WHOM IT MAY GONCERN:

Be it known that we, GEORGE F. Iinwrs, of Philadelphia, 'county of'Phila'delphia, and State of Pennsylyania, and FREDERICK D. STUAIIT, oil Washington city, and District of Columbia, have invented certain new and nscful'Iniprovements in Printing-Cylinders for Plate-Printing; vand we do hereby declarethat the following is a full, clear, Aand exact description of thesaine, reference 'being had to the annexed drawings, an'd to the letters of reference marked thereon, making part of this specication, in which Figur-,e 1 is a transverse section looking from one end Figure 2 is a side elevation. y

Figure 3 is a transverse section looking from the other end.

Figure 4 is an enlarged plan view of detergent-roller and bung-apparatus.

Figure 5 is an. enlarged section of the printing-cylindcr, showing the gas-burners.

Figure 6, enlarged sections of the detergent-roller vtrough and detergent-boards and springs.

The nature 'of our invention consists in the use of engraved cylinders for platesmengraiving instead of the usual flat plates. i

It has beenv customary to engi-ave, upon a softened steel plate, devices, pictures, or designs, and then harden the plates, and transfer the engraving to a soft-steel cylinder, Iwhich, in turn, is hardened, and lbecomes the inatrix from which all future ,plates -ea'n be renewed.

This class of printing from cylinders" hasnot been hitherto' successful, in consequence of the diiculties connected with the inking and cleansing of the surfaces not engraved. vIn calico-printing, where the figures ure not expected to be welldened, or ti; possessthat sharpness of. outline which `must be in paper engravings,

Y the cleansing is effected to some extent, butnot suliciently to answer for inc engraved lines. if

In our machine, we accomplish this in such a successful manner as to insure the' same finish ande'ect as in plate-printing, which is new done mostly by hand. TheV slowness of the process in ordinaryplate-printing -hns kept back the progress of' that art far behind all other methods of printing, and hence the prime necessity of introducing a process whereby the onward movemcntof the cylinder-printing, which hasbcen so successfully employed in all other branches off'the printing-art, should be' applied to the most'linished'and beautiful .of them all. By our machine, we can print all manner of engravings, however large or small, as rapidly as fnewspapers,

are thrown out from any cylinder letter-press. In the small designs, such as postage-stamps, labels, circulars,

bank-nietes, checks, bills, Ste., by repeating the .design upon the periphery of the cylinder asV often as. the circumference will admit, and side by side-to the lineal extent of its. axial dimensions, andwith paper in rolls, if necessary, thousands upon thousands may be multiplied. by the minute, so that plate-engraving willbecomc as ,common as the daily newspaper,.thc handbill7 ortircnla'r.

To enable others skilled in the art to`malre and use our invention, we will proceed to describe its construction and operation. i

A is the frame, of iron; A1, the pressing-roller; B, the printing engraved cylinder; B1, the pulley on the end of its shaft; B2, the Vspur-wheel on the other end of front-cylinder shaft, C, the inlr-roll'er; C1, the

distributing-rollerj` 1), the doctor or scraper; E, the second wiping-roller; F, the detergentgro'ller; G and G1,

rollers with endless cloth, g and g; H, the ink-trough and stand; I, the `detergent-trough and stand;A K, the '`e cd-board; L, thc delivering-board; a, tlie slides, tted into the frameA. to permit the removal' of the detergentapparatus; al, the clamp holding the two slides a firmly together; a2, the screw and nut by which the clamp and slides are held to the frame; 6, the gas-tube in the centre of the printing-cylinder B, for gas-burners; b1,

a'second pulley on shaft of B, to drive the pulley of G; c, the fulcrum of lever cZ in stand H; cl and c, the

gas-tubcs in the ink-'rollers C and C1; 92the pinion on G, taking motion from the intermediate wheel as, actuated b the main s ur-wheel, B2, on c linder B; l x, s rines on the deter ent-rubber F1, and one of which, acted y P y L P s s upon by the rackf on the end of roller F, causes it to have a rubbing lateral motion to and fro; fz the puliey,

and f3 the buff on the edge of F1; g g, the endless clothvrunni'ng around G G1; h, the tube in ink-troughstand for gasburners; 2', the spring under roller FQ; z, the board supporting the-detergent-compound Il; i2, the lower board. Between these boards are four or more springs, z', along the' length of the trough, to hold lip the detergent to the roller.

In the application of cylinders for printing engravings, itbecomes necessary' to heat the cylinder, which has heretofore been done by steam or hot air, or heated irons placed under the plates; but we have found that in the` use of steam or hot air for the purpose of heating the printing-cylindcrand the ink-trough heretofore used, tb'ere can be no readymeaus of regulating 4the temprature at these -partsof the machine, as when steam from the boiler or h ot air from th/e furnace is used, it must be at the temperature of steam or the furnace; but by our use of gas, nder the control of valves atthc machine itself, the operator has h ntire control, and can regulate the temperature by the gauge of the burners, according to the thermometer, or it may be arranged automatically, to any degree of temperature required, by any Ausual device of extension-bars, operating upon a lever-handle to the gas-valve immediately at the press. We therefore make. the printing-cylinder hollow, for the introduction of av gas-tube with a series of burners; and for economy, the main part of the cylinder may be of cast iron, and an annulus of steel or copper, or any other suitable materiahmay be fitted thereon, or the' cylinder may be all of steel. We do not limit our inrcntionin this particular. The hollow space, however, should always be in proportionto the diameter of the cylinder, so that the heating may be donc to suit the circumstances of cach cylinder. In connection with the heating of the cylinder, we introduce, simiiarly, jets of gas ina tube beneath the ink-trough, so that the ink, being properly warmed, is transmitted to the engraved cylinder; and, that its temperature may not be reduced, we make the inking-rollers, lboth ductors and distributingrollers, hollow, and provide gas-burners within them, as many as may be found requisite to keep up' the proper degree of heat. These i'nking-rollers are to be made of hollow metal cylinders, covered withsuitable materials for inkingsur-faces, and which will resist the action of a. moderate degree of heat.

In connection with the heating of the ink and printing-cylinders, we introduce, by a series ofcog-wheels, as represented, commencing on the end of the shaft ofthe printing-cylinder, with a spnr-\vhcel, which trsnsmits A its motion, by an intermediate pinion, to another wheel on the end of the shaft, carrying the endless-cloth' l wiper, thedireetion of which'wiper is reversed from that of the printing-cylinder, and running at a more rapid rate, we have amore successful method of cleaning the uuengraved surface than is .usually applied. Preceding the cloth wiper is a doctor. Following the wiper is another roller, covered with any suitable material, of ri'lbber clothor other elastic surface, which aids in further removing lthe surface-ink, and the cylinder is ready for the detergent substance, vwhich impingcs below the detergent-roller, and is kept up to it by springs, the detergent being in a. solid form, and continuous along the roller. This roller is then rubbed by the bulingi-surface, which maybe of buckskin, chamois leather,'or other equivalent material.

We believe that in this machine for cylinder-engraved printing ive have combined all the essential features necessary to produce as ne and beautiful prints as can be produced by the iatplate, and in so rapid a manner as to re'ducethis class of printing to the same economic standard as letter-press, stereotype, lithograph, or any other of the branches of the printing-art.

Patent, is

1. Applying Whiting or other material, as a detergent, to thecylinder, in a solid form, b v. means of boards il i2 and springs t', 'or equivalents, substantially as described. i 2. The buh` fi" applied to the detergent-roller F, substantially as and for the -purpose described. The application of gas to heat the printing-cylinder and the ink-rollers, by means of pipes b passing through said rollers, and provided with'burners or jets b bl, substantially as described.

In testimony whereof, we havesigued our names t'o this speciticationin the presence oftwo subscribing witnesses.

GEO. F. LEWIS,

- .Y FRED. D. STUART.

Witnesses:

JOHN D. BLoon, EDWIN JAMES.

i Having thus fully described our invention, what we claim therein as new, and desire tosecure by Letters 

